MP Sheild issues

[BJ Shock]

My 9mm shield is acting up...

...Full mag, one in the chamber, aim and shoot.

Shoots fine. Try to shoot again... nothing.

Try to rack the slide... its stuck.

Notice that slide is not fully forward...

Bump it hard with my hand...slide goes forward... shoots fine and the same thing happens every time,

Tried JHP and FMJ, same thing...

 

[Doug M.]

How well lubed is it? A decent quality semi-auto (pistol or rifle) should easily go 1500 rounds without cleaning a long as it is properly lubed. What ammo brand?

 

[Kp321]

Sure sounds like ammo/chamber problem. Been shooting any steel case ammo? It can leave a sticky residue in the chamber. Clean chamber very well, steel wool wrapped around a brush and spun with a drill.

 

[rwsmith]

Sure sounds like ammo/chamber problem. Been shooting any steel case ammo? It can leave a sticky residue in the chamber. Clean chamber very well, steel wool wrapped around a brush and spun with a drill.

I use a copper chore boy for that.

 

[BJ Shock]

My 9mm shield is acting up...

...Full mag, one in the chamber, aim and shoot.

Shoots fine. Try to shoot again... nothing.

Try to rack the slide... its stuck.

Notice that slide is not fully forward...

Bump it hard with my hand...slide goes forward... shoots fine and the same thing happens every time,

Tried JHP and FMJ, same thing...

Sure sounds like ammo/chamber problem. Been shooting any steel case ammo? It can leave a sticky residue in the chamber. Clean chamber very well, steel wool wrapped around a brush and spun with a drill.

Yup dirty chamber. Silly me.

 

[toddstang]

Mine wasn't a dirty chamber.
First time out it did exactly what the OP's did.
Sent it back to S&W. They said that they polished and "Reworked" the barrel.
So far it's been 100% since it's returned.
Pics are from the failures.
Also, didn't have pics, but the slide would not go fully forward when it would cycle next round.

 

[BJ Shock]

Tried to shoot it again today.
Shot two rounds then nothing.

Fresh round hung up in the chamber..wont fully seat unless I hit the slide with my hand.

Slide wont eject round unless I force it.

The case is getting stuck at the very base of the chamber

I cleaned the chamber and even scraped around the shoulder/base with a pick.

Caint see any debris at all.

I'm thinking a chamber finish reamer at this point?

 

[mckenney99]

Just to give you something else to look for that has popped up in the past. The slide stop spring that is located in the left side of the locking block can work its way out and impinge on the slide.
The link is how to check and address this issue.

F

Post in thread 'Fix Your Shield Before It Fails!!!'

Jul 3, 2022

I found this thread recently when searching about slide stop issues.

A friend's Shield from 2017 had this spring problem that bound up his slide.

My new Shield Plus came with a slide stop spring sticking out half way, so this issue remains even today. I tapped the spring in below flush after addressing other issues with the spring.

I think Shields are decent pistols, but nothing is perfect. All guns have quirks. It's good to learn about and pay attention to the known weaknesses of one's firearms, particularly those intended to be used for defensive purposes.

The attached pictures...

• flyingbrass

 

[swsig]

Below is an 8-year old post that may help you. On a few Shields, the end of the slide stop spring pops out of position from where it's supposed to be seated in the locking block. This can prevent the slide from moving forward. The attached post below has a photo of a normal spring position and an unseated "popped out" spring position.

H

Post in thread 'Fix Your Shield Before It Fails!!!'

Oct 24, 2017

I think this is what they are talking about:

• Hunter8282

• 

 

[cracker57]

Whats the round count of the pistol? Have you tried the plunk test with said ammo that's malfunctioning?
Is a new recoil spring in order? I love answering a question with questions LOL